Syringe



Patente luna-3;, 19,.

JOSEPH W. LIVINGSTONE,

or Henson, wisconsin.

SYRING-E.

Application filed June 9,

T 0 all whom t may concern? Be it 'known that I, JOSEPH W. LIVING- sToNE, a citizen of the .United States, resident of Hudson, county of Saint CroiX, State ,of vVisconsin, have invented certain new and useful Improvements in Syringes, of which the following is a specification.

My vimproved syringe is adapted for a variety of purposes in the practice of medi# cine and surgery. The primary object of the invention is to provide a syringe which can be illed without placing the needle in the tissue or closing the en d of the needle, no air being allowed to enter the barrel of the syringe or be forced from the syringe into the tissues or blood vessels.

A further object is to provide a syringe which can be used as an aspirator in remov ing Huid from the pleural or abdominal cavity, no air being allowed to enter the cavity during the operation;

A further object is to provide a syringe which can be used for the direct transfusion `of blood with no danger of forcing air into the blood vessels.

A further object is to provide a syringe adapted for Ythe injection offluids into the tissues to combat shock following injury or prolonged operations. Y

A further object is to provide a syringe which can be easily and quickly adapted for douche or spraying purposes. p

The invention consists generally in various constructions and combinations, all as hereinafter described and particularly pointed out in the claims.

In the accompanying drawings forming part of this specification,

Figure 1 is a longitudinal sectional view through a syringe embodying my invention, illustrating its use for injecting. a liquid into the tissues, Figure 2 illustrates the adaptation-of the device for injecting fluids at two 'points into the tissues, following injury or long opera tions,

-Figure 3 illustrates the syringe adapted for the direct transfusion of blood, j

Figures fi and 5 illustrate how the syringe may be adapted for use as a douche or or spraying purposes.

lin .the drawing, 2 represents the syringe barrel, made of metal, glass or any other suitable material. At one end the syringe barrel has a cap 3 provided on one side with an interiorly threaded nipple 4 communi 1922. Serial Nb. 567,106.

*eating through a port 5 with the interior of the barrel. The exteriorly threaded nipple 6 is formed on the cap 3 and communicates through a port 7 with the syringe barrel. 60'

An exteriorly threaded plug 8 is fitted into the nipple 4 and has a valve chamber 9 in which is arranged a ball valve 1,0 having a limited movement lin said chamber `between the pin 11 and the seat 12 at the entrance 65 of a duct 13 which extends through the plug 8 and through a nipple 14 formed thereon. This nipple has a grooved outer surface and is adapted to be inserted into the end of a l piece of tubing 15 that is inserted into a Huid 70 containingl receptacle 16 and is provided with a weight 17 yhaving a port 18 therein through which the fluid is conducted to the tubing and from thence tothe syringe barrel.

Within the nipplel 6 is -a' valve chamber 75 19 adapted to receive a valve 20 which has freedom of movement between a pin 21 and a seat 22 adjacent the duct 7 through which the fluid in the syringe barrel is discharged.

An interiorly threaded cap 23 is adapted to 80 -receive the nipple 6 and a plug 24 is tapped into said cap and has a duct 25 therein andl a nipple 26 adapted to receive the .en'd of a hypodermic needle 2 7 of ordinary construction. A plunger 28 is mounted in the barrel 85 2 and is provided with a thumb grip 29 and corresponding finger grips 30are mounted on the barrel to be grasped by the user for holding the barrel in the desired position while the plunger is being manipulated to draw the fluid into the syringe barrel through the inlet and to discharge said fluid* through the outlet.

The devi as shown in Figure 1 is adapted for the injection of a fluid into the tissues without the necessity of first inserting the needle into the tissues or `closing the endof the needle. When the plunger is withdrawn to the position-indicated in this figure, the

fiuid in the receptacle will flow up through the tubing into thebarrel, the check valve opening for this purpose, and simultaneously the check valve 2() will close, preventing the entrance of air into` the barrel and eliminating the necessity of closing the end ci the hypodermic needle either by inserting i. it into the tissues orclosing. the orifice in the end of the needle.

When the syringe barrel has been filled,

the user may torce the plunger into the barrel, discharging the fluid through the needle und simultaneously closing the check valve in the assage leading to the fluid receptacle. Thus t e valves will alternate in operation, one opening and the other closing as the plunger is reciprocated.

llt is often desirable to inject a fluid at different points in the tissues to combat shock following a severe injury or in cases where an operation has been unexpectedly.

prolonged. My syringe is adapted for such uses. The single needle is removed and in place thereof a Y 3l is substituted, having tubes 32 and 33 thereon provided with needles corresponding to the one described. The method of operation is the same as described with reference to Figure l.v

The apparatus can also be used for the direct transfusion of blood without any danger of forcing air into the blood vessels. In such cases I mount a hypoderinic needle on the end of the inlet tube 15 and insert this needle into the blood passage of the donor. A section of tubin 15 is mounted on a coupling 34 that is tted into the outlet nips ple and the hypodermic needle on the tubing 15El is then inserted into the lblood vessel of the recipient and with the movement of the syringe plunger the blood is transfused without exposure to the air and without possibility of air entering the blood vessels.

In Figure 4 the coupling 34 is shown connected to a section of tubing 15b on which is a nozzle 35 and in Figure 5 another form of nozzle 36 is shown. With these nozzles the syringe is adapted for douching or spraying purposes.

I claim as my invention: 1. A syringe comprising a barrel,l a detachable cap having inlet and outlet valve chambers therein, the outlet valve chamber -ing in the side of being integral with the cap and the inlet valve chamber being detachable from said cap, valve seats and ball valves thereon, whereby said syringe may be easily taken apart and sterilized, an inlet passage at the bottom of the inlet valve chamber connecting said valve chamber with the barrel whereby air that might enter the inlet valve chamber would be trapped therein when fluid is being pumped through said chamber into-the barrel and out through'the outlet chamber.

2. A syringe comprising a barrel, a piston, the outward surface of which closely its.within the barrel throughout its length and which, therefore, may be easily removed from the barrel for sterilization purposes, said barrel having a cap at one end, an openthe barrel registering with an inlet opening in the cap, said cap having also an outlet passage, valve seats and valves, said cap being also removable from said barrel for sterilization purposes.

3. A syringe comprising a barrel, a piston of the same dimensions throughout as the interior of the barrel, saidvbarrel having also at one end a detachable cap, said capI having detachable inlet. and outlet connections, valves, valve seats and valve chambers adapted to be easily sterilized, the-inlet valve chamber being connected at its bottom to said barrel whereby the syringe may be easily taken to pieces and sterilized and any air drawn in with the fluid through the inlet chamber will be trapped therein and will not be projected through the outlet valve chamber to injure the patient.

In witness whereof, I have hereunto set my hand this 5th day of June, 1922.

JOSEPH W. LIVINGSTONE. 

